GEKO conical HSS TiN cutter set 6 pcs, diameters 6.3–20.5 mm, model G38520

Set of six GEKO conical HSS TiN cutters with diameters from 6.3 mm up to 20.5 mm, designed for controlled hole enlargement, chamfering and deburring. Each step-shaped cutter provides a smooth progressive diameter change that allows gradual material removal and accurate edge shaping. The high-speed steel (HSS) construction with titanium nitride (TiN) coating improves wear resistance and cutting life, making the set suitable for general metalworking and workshop tasks on steels and non-ferrous metals.

Advantages

The conical HSS design delivers consistent cutting performance across a range of diameters without the need to swap multiple single-size tools. TiN coating increases surface hardness and reduces heat buildup during machining, which helps extend tool life and maintain cutting accuracy. The stepped profile enables precise, incremental material removal for chamfers and hole enlargement, while the solid HSS body provides toughness for intermittent and continuous cutting operations.

Suitable for

• Progressive hole enlargement and reaming operations
• Chamfering edges and creating bevels on drilled holes
• Deburring and removing sharp edges after machining
• General workshop metalworking on steels and non-ferrous metals
• Applications requiring variable diameter control with a single tool

Key specifications

• Material: high-speed steel (HSS) with titanium nitride (TiN) coating
• Number of pieces: 6 conical cutters
• Diameter range: 6.3 mm to 20.5 mm (progressive stepped diameters)
• Geometry: step-shaped conical profile for progressive cutting
• Typical use materials: steels, non-ferrous metals

How to use

Select the appropriate conical cutter and mount it securely in a compatible drill or holder designed for rotary cutting tools. Start at low speed and advance the cutter gradually into the hole or against the edge to be chamfered, allowing the stepped profile to remove material in controlled increments. Use steady feed pressure and moderate spindle speed appropriate for the workpiece material to avoid excessive heat. Retract the cutter periodically to clear chips and inspect the progress until the desired diameter or chamfer is achieved.

Usage recommendations

Use cutting fluid or appropriate coolant when machining steels to reduce heat and improve surface finish. For non-ferrous metals, a light lubricant or intermittent cuts can prevent material smearing. Inspect cutters for wear and TiN coating condition before precision work and replace if excessive rounding or chipping is observed.